Difference between revisions of "Template VI1/Intrusion on the 4th row"

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(Simplified the analysis by using a ladder creation template)
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This page is devoted to details on how to [[Defending against intrusions in template VI1|defend against intrusions in template VI]]. This page explores Red's possibilities to defend the template when Blue intrudes on the 4th row.
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#REDIRECT [[Edge_template_VI1a#Intrusion_at_e]]
 
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<hexboard size="7x14"
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  coords="none"
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  edges="bottom"
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  visible="area(a7,n7,n5,k2,i2,c5)"
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  contents="R j2 B i4"
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/>
+
 
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Red should move here (or the equivalent mirror-image move at "+"):
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<hexboard size="7x14"
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  coords="none"
+
  edges="bottom"
+
  visible="area(a7,n7,n5,k2,i2,c5)"
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  contents="R h3 j2 B i4 E +:k3"
+
/>
+
 
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Now the shaded area is a [[ladder creation template]], giving Red at least a 3rd row ladder as indicated.
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<hexboard size="7x14"
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  coords="none"
+
  edges="bottom"
+
  visible="area(a7,n7,n5,k2,i2,c5)"
+
  contents="R h3 j2 B i4 E +:k3 S area(h3,g3,e4,c5,a7,h7) E arrow(3):(h5 h6 h7)"
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/>
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Red can escape both 2nd and 3rd row ladders using a [[ladder escape fork]] via "+". Specifically, Red escapes a third row ladder like this, and is connected by a [[ziggurat]] and double threat at "+":
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<hexboard size="7x14"
+
  coords="none"
+
  edges="bottom"
+
  visible="area(a7,n7,n5,k2,i2,c5)"
+
  contents="R h3 j2 B i4 E +:k3 S area(h3,g3,e4,c5,a7,h7) R 1:h5 B 2:h6 R 3:j5 E +:i5"
+
/>
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If Blue [[ladder handling|yields]], or Red starts out with a 2nd row ladder, the escape fork works anyway:
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<hexboard size="7x14"
+
  coords="none"
+
  edges="bottom"
+
  visible="area(a7,n7,n5,k2,i2,c5)"
+
  contents="R h3 j2 B i4 E +:k3 S area(h3,g3,e4,c5,a7,h7) R 1:h5 B 2:h7 R 3:h6 B 4:g7 R 5:j6 B 6:i6 R 7:j5 E +:i5"
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/>
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[[category:edge templates]]
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Latest revision as of 01:39, 30 April 2021